Microscopic motors are currently a major subject of investigation in all natural science: biology, chemistry, and physics. Motor proteins like Kinesin, Myosin or Prestin seem to play roughly analogous roles in living cells to automobiles in industrial economies, but the microscopic versions certainly work differently. They operate out of equilibrium and thermal fluctuations are not negligible for them [1]}, [2]}. Some proposed theoretical models for microscopic motors, such as ratchets or Brownian motors, are passive [3]}, [4]}, in the sense that they obtain their energy from fluctuations in immediately surrounding reservoirs. Other models are active, either by being driven by systematic external forces from light or sound [5]}, [6]}, or by drawing on an internal energy depot [7]}, [8]}.
